<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<style>
    div.top{
        background-color: #eee;
        color:#000;
        height: 160px;

    }
    div.left{
        background-color: greenyellow;
        height: 600px;
        float: left;
        width: 400px;

    }
    div.right{
        background-color: coral;
        height: 600px;
    }
    div.footer{
        background-color: #000;
        color:#fff;
        height: 200px;
        line-height: 200px;
        clear:both;
    }
</style>
<body>
<div class="top">top</div>
<div class="left">main left</div>
<div class="right">main right</div>
<div class="footer">footer</div>
</body>
</html>
